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Nonlinear relationship of FLI and kidney stones. The solid purple line displays the OR, with the 95% CI represented by purple shading. They were adjusted for gender, age, race, education level, marital status, family PIR, smoke, alcohol, physical activity, DM, hypertension, CHD, stroke, and cancer. FLI, fatty liver index; CI, confidence interval; PIR, poverty-to-income ratio.
